.top_big_box {
    border-bottom: 1px solid lightgray;
    height: 59px;
}

.top_menu {
    width: 1200px;
    height: auto;
    position: absolute;
    margin-left: auto;
    margin-right: auto;
    left: 0;
    right: 0;
}
.personal_center {
    position: absolute;
    border: 0 solid brown;
    right: 0;
    width: 200px;
    height: 59px;
}
.head_div {
    position: absolute;
    height: 59px;
    line-height: 54px;
    width: 40px;
}
.my_info {
    position: absolute;
    width: 160px;
    margin-left: 40px;
    line-height: 59px;
}
.el-dropdown-link {
    margin-left: 10px;
    line-height: 56px;
}
.username_div {
    cursor: pointer;
}
.center_menu {
    width: 1200px;
    margin-left: auto;
    margin-right: auto;
    left: 0;
    right: 0;
}
.login_div {
    font-size: 15px;
    line-height: 60px;
}
.login_tip {
    width: 100%;
    font-size: 14px;
}